 |
|
|
|
|
|
|
|
|
|
|
| • |
This work was a
popular piece of scientific literature in the
|
|
|
sixteenth
century in which Porta gives a thorough description
|
|
|
of a camera
obscura and the images that one would see. From
|
|
about this
point on, the camera obscura would become a
|
|
|
useful tool to
artists.
|
|
|
| • |
In the second
edition of his popular title, which was published
|
|
|
in 1588, Porta
includes a lens for the camera instead of a
|
|
|
pinhole. This
improved definition and allowed an image to be
|
|
|
sharply focused
on a piece of ground glass, allowing the
|
|
|
operator to
trace a picture on a sheet of paper laid over the
|
|
|
glass.
|
|
